Art of beveling glass.



O. L; GOEHRING & W. TROCHB.

ART or BEVELIRG GLASS. APPLICATION TILED JULY 19, 1908. 917,937. Patented Apr. 13, was.

UNITED STATES PATENT ()FFKFE.

CHARLES ll, (ROEl-IRIXU i\ ll.l.l.\.\l TRUtHl'I, Ol" AKRON. HIO; 54AM) TROCHYC .LSMGNOR Tl) RAH) 'EUiIHP-IXH.

ART OF BEVELING GLASS.

Specification of Letters Patent.

Application filed July 19, 1906 Patented April 13, 1909.

Serial No. 326.8%.

ments in the Art of Port-ling (ilriss: and we do hereby declare the following tobe a in,

clear. and exact des ript on of the same refings, form! o :1 part of this specification, and to the letters of reference marked thereon.

in glass grmdn' and particularly in grinding" bevels n gh plates ithas heretofore Ia been found exceedingly ditlicult' to grind away the surplus glass and at the some operation and with theszune grinder produce asurface and edges to the bevel read for the step known in the art as white wheeling. The difiiculties are due to the danger of breakage to the formation of irregularities, deep scratches or scoring of the ground surface and to the sand blasting" f the edges of the bevel under ordinary manipulations.

hml to the :u-compmrving drnw- 3 be practiced. Figs. 2. 3. 4. 5 and 6 are cle- 55 mil diagramma ic'settiuns illustrating the several movements of the glass and grinder with relation to each other in accordance with the present invention.

Like letters f reference in the se. eral tig- 60 ures indicate the some parts.

The grinder is indicated b vtl .eletter A and the glass by the letter B. As illustrated in Fig. 1 the glass is heid in a earriage (I and 3 suitably clumped by a clamp l) for presenta- 6.3

The object of the present invention i to the glass establishes a grinding t'niltzlci with the stone and the lr'cl or inner cd"e f the bevel i formed. then each other in a plane parallel with the plane immediatelv mova mg the glass and grinder with respeel tof an elevated chamber U: which a body of Wu- 40 of the bevel and while maintaining the edge ol' the glass seated against the grinder. to 5 l'ormthe llnt face and outer etlgeol' the bevel. is m lcedmg The invention further cons water to the grinding mint b the rotation of the grinder and eonlunng the body of water being fed from a point within the tool; i

beneath the grinder to a point in proximity to the grinding p int whereby the volume ol water fed to the grinding point is augmented sullicientl) to maintain the edge l' the glass immersed. v

1n the accompanying drawings- Figure I is a sectional elevation of a portion of a machine with which the present invention ma)- lion to the grinder, but inasmue 1 as the meehanism for moving the same forms no part of the present inventi n. it is not illustrated. Conveniently, the carriage C may be mounted on a frame pivotally mounted 7C on a (enter at around whieh it swings in moving the glass toward and away from the grinder. The movement of the frame is imited by an adjustab e st p C The grinder is bodily movable on a. horizontal 7: way A. and bodily movementis imparted t it through connecting rod A".

The grinder A is an ordinary cylindrical grinder rotated toward the glass as indicated by the arrows L and snlliciently eoarse to So grind ;l\\at the glass rapidly and it runs with its lower portion in a. body of water held in a tank E. Extending from a point below the water level in the tank around and in proximity to the upwardly moving side of the grinder is agusrd l forming a shallow channel in hit-h water is carried up by the grinder to the grinding mint The effect of confining the water by the guard is to enable the grinder to elevate relatively large volso tune f water and th guard is extended above the level of the grinding point to form ter is confined to keep the leading edge of the glass eomplctelv immersed, this being found neet'ssary to prevent breakage of the glass being operated on. Obviously the water may be eonlined on the upper side of the grinder by any desired means.

In presenting the glass to the grinder in accot-dance with this invention the parts initiall voccupy the positions shownin Fig. and are moved directly toward each other as by moving the glass down as shown by th airrowsf, (Figs. .2 and 3') the point of initial contat-t being sulliciently far in advance of the heel as inner edge of the bevel to permit the front edge of the glass to seat against or form a grinding contact with the grinder before the inner edge or heel of the bevel is formed. Atv the. instant when the grinder has entered the glass to the. required depth to form the heel or inner edge of the bevel their movement toward ear-bother is arrested and the glass and grinder are given :1 tr verse or feed movement with relation to each other in a plane parallel to the plane of the bevel being formed as indicated by the arrows M (Figsv 4 and 5) and in direction to carry the rinder toward the front or outer edge of the evel. During the whole of this movement parallel with the plane of the bevel the edge of the glass is kept in grinding contact wit the grinder to form an abutment [or preventing the entry of free gritbetween the grinder and glass. When the surplus glass is removed '(Fig. 5) to the plane of the bevel indicated in Figs. 2, 3 and 4 by the dotted line K the glass and grinder are at once separated as shown in Fig. 6. During the whole of the. grinding operation a body of water is maintained on the upper side of the grinder suliicient to keep the grinding point immersed.

It is important that the feed movement shall commence instantly upon the cessation of the. movement of the glass and grinder toward each other and that the feed movement and speed of rotation of the grinder shall be uniform during the cutting of a bevel in order to avoid the formation of waves or irregularities in the bevel. stoppage or variation in the feed movement or variation in spee t of rotation of the grinder it is found cuts the glass more. or less at the point being operated on and even though it be slight the imperiectionis apparent owing to the difference in light reflection and refraction.

The bringing of the edge of the glass into grinding contact with the grinder and maintaining the said cont-act throughout the whole of thegrinding operation is of the highest importance inasmuch as it is found that by this procedure alone it is possible to pre vent the formation of scratches and sand blasted edges and at the same time maintain the grinding point immersed in.a sufficient bpdy of water to prevent breakage of the g ass.

Having thus described our invention, what forming the inner edge or heel of the bevel and then the plane face and outer edge of the bevel.

2. The improvement in the art of grinding flat bevels on glass plates, which consists in establishing and maintaining a grinding contact between the entire edge of the lass and h the convex face of a grinder during the entire formation of the bevel by the rinder and moving the grinder and glass with respect to each other parallel to the plane. of the bevel.

3. The improvement in the art of flat beveling glass plates, which consists in rotatin g the grinder toward the glass, establishing a grinding contact between the edge of the glass and grinder and while. maintaining such contact, formin first the inner edge or heel of the bevel an then the plane surface and outer edge of the bevel by a traverse of the grinder and glass with relation to each other parallel with the plane of the bevel.

4. The improvementin the process of beveling glass, which consists in rotating the grinder toward the glass and thereby elevating water to the upper side of the grindu, confinin said water in a. body on the upper side of the grinder, and presenting the glass to the grinder with its edge immersed in said body of water.

5. The improvement in the process of beveling glass, which consistr in rotating the rinder towarr the glass and thereby elevatmg water to the upper side of the grinder, confining said water in a body on the upper side of the rinder, presenting the glass to the grinder wit its edge immersed in said body of water and maintaining a grinding contact between said edge and the grinder during the formation of the bevel.

' CHARLES L. GOEHRING.

WILLIAM TROCHE.

. W'itnesses:

H. M. HoLmNoEn, MARY MARTIN. 

